Crayon holder with screw feed type adjusting means



W. D. MEASE Dec. 27, 1949 CRAYON HOLDER WITH SCREW FEED TYPE ADJUSTING MEANS Filed March 18,- 1946 INVENTOR.

W/LBUR a MEA 5/5 a? Q, 6 Z wrw/b ATTOHNEY Patented Dec. 27, 1949 UNITED STATES O F'Fl-CE GBAON HOLDER WITH .SGRE'W FEED FIY PE ADJUSTING .MEANS Wilbur D. Mease, Hayward, Calif.

Application -March 18, 1946, SeriaLNo. 655,146

80mins. l

This-invention relates ;to improvements in mechanical writing implements.

The primary object of this invention is the provision of a mechanical writing "implement adapted to receive marking crayon having improved means for feeding and protecting the crayon against disintegration during thefeeding thereof.

A further object of this invention is the ,provision of a mechanical pencil adapted to receive writing crayon of the type known asggrease lead or china marking lead embodying improved means for sealing the "lead against disintegration as a result 'of "mechanical feeding of it through the pencil.

Other objects and advantages of the invention will be apparent from the following detailed description.

"In the accompanying drawing, forming a part of this specification, and wherein the 'same reference characters designate the same parts throughout the several views,

Figure 1 is a longitudinal cross sectional View taken through the improved-pencil.

Figures '2, Band 4 are transverse cross'sectiona'l views taken substantially on their 'respec'tivelines shown in Figure 1 of the drawing.

Figure '5 is a fragmentary end view of a sleeve or sheathadapted to housethe lead.

Figure 6 is -a side elevation of part of the :rear end of the sleeve or sheath; this viewbeing taken at a turned angle of 90 with respect toth'e view shown in Figure 5.

Figure '7 is a fragmentary sectionaliview taken longitudinally through the rear end of the crayon showing an improved protecting shield therefor.

In the drawing wherein "for the purpose of illustrationis-shown-on-ly a preferred embodiment of the invention, the letter A may generally designate the improved pencil adapted to receive crayon B of the grease or china marking "type.

This type of crayon is well known in the art and.

because of its softness it is apt to crumble as an incident of feeding thereof through the pencil.

In=some instances -particles of the crayon adherev to the walls of the sheath or sleeve housing the same and'this sooner or later gets intothe feeding mechanism. One-of the "most seriousdisadvantages of feeding this sort-of crayon is because the impellin'g *or 'feeding'mec'hanism coming has direct contact with the crayon will cause the inner end to crumble and disintegrate. This 'is at the inn'er'end, and of "course 'thepar'ticles have:

a tendency to lodge at the inner end of the feedingmechanismand to 'clogthepencil.

The writing element 113 preferably consists of vision upon the body III, at the rear end, of a.

shield II, preferably of .metal, plastic or some other rigid material. It is of ferrule formation and has a forward chisel edge [2 which may lie flush w'ith'the external surfacing .of the .body [0 or slightly project radially outwardly therefrom, altho this is not necessary since it is intended that the ferrule will fit closely at its surfaces '13 in snug engagement with the inner confines or surface .of the sl'eeveor sheath housing the same, as shown in Figure 1. The rear end of .theferrule or shield H is rearwardly convergently tapered .at M and terminates in an end wall 15. This reduction enables the ready insertion of the marking crayon into the pencil magazine or sheath. Of course the shield 'is preferably an attached part of the body l0 and it is intended that these portions [0 and II will be sold as a unit forrefill purposes.

Referring to the pencilA, the same includes a main casing structure '20 defining a chamber 2| therein; the casing 20 at its forward end 22being reduced and at its extreme forward tip 23 being.

tapered forwardly convergently and defining an opening 24 which is justslightly larger than the diameter 'of the body l0. and preferably adjacent the juncture of the larger diametered portion of the body 20 with the portion Z2 there is located .a wall or portion 2.6 having a screw threaded opening 21 therein adapted .to receive the impeller screw or member 28. The latter is supported within a frame 35 which is rotatably disposed in the compartment 21 and is reduced at its outer end at 36. rear end portion 31 of the casing '20 is peened or turned over 'the shoulder 38 formed at the juncture of the portion '36 with the body of the frame '35 in order to .rotatably retain the framev 35 in the housing 20, at the time of fabrication or assemblage.

The feed screw 28 at its rear end is provided withxopposite radial extensions 40,.shown in Figure 4 and also Figure, .1, which slide along the passageway "42 of the frame 35. The latter is indented longitudinally at .44, .to provide abutments which .will .not. permit relative rotation of the feedscrew withrespectto the framed! when.

Intermediate its ends.

The

the latter is rotated for feeding the screw. In addition the frame 35 is provided with integral lugs 46 which limit the rear movement of the impeller or feed screw to the position shown in Figure 1.

The sheath structure for receiving the writing stick B may consist of an elongated unsplit sleeve or it may consist of the structure shown in-the.

When

tary parts 50 and 5| are in close abutment and U do not provide any space therebetween. Upon the complementary portions 5!] and 5| of the sheath I provide a contracting clip 60 which is split at a portion 62 and which contracts the segments 5!! and 5| into cylindrical sleeve-like form; the normal position of the same being shown in Figures 1, 2 and 3 of the drawing. This split arrangement of the sheath or sleeve is provided for the purpose of facilitating ingress of the marking crayon or assemblage B into the sheath. The nut or wall 26 is provided with a counterbore 62, shown in Figure 1, into which the rear end of the sheath extends for free sliding movement; the rear end of the sheath sections 53 and 5| being slotted at 64 and receiving bosses or splines 65, shown in Figure 3, for the purpose of preventing rotation of the sheath and its complementary parts 50 and 5| with a range of longitudinal movement of the sheath or sleeve within the pencil casing. It will be noted that a space 0 occurs between the rear edge of the sheath and the end of the countersink 62 and this distance defines the play which the sheath or sleeve has within the pencil casing.

In order to insert a marking assemblage B with facility into the pencil casing, it is merely necessary to have the feeding impeller in the position shown in Figure 1, or substantially retracted. The crayon is then inserted with its shield first, and the tapered shape of the shield will guide the element into the sleeve without damaging the crayon. This action will move the sleeve sections 50 and 5| rearwardly and cause their radial expansion should such be necessary in order to enable and facilitate the entrance of the crayon into the sheath without damaging the crayon. When the crayon is fully inserted it is merely necessary to relatively turn the feeding frame 35 within the casing through the handle extension any tendency of the sheath to expand, particularly at the fore end, and the clip 60 will hold the sheath sections 50 and 5| contracted. The feeding may proceed and it will be noted that there will be no crumbling and distortion of the body It! of the crayon as a result of engagement of the impeller screw 28 since it only contracts the metal or other rigid shield tion of material from the walls of the body |l| upon the shield. In other words, the shield will scrape'the walls of the sleeve clean. The spring The chisel. edge I2 of the shield closely engages the inner walls of the sleeve and prevents any accumula-.

action of the clip 60 is suflicient to maintain the sleeve sections longitudinally closed upon the crayon during the feeding action.

Various changes in the shape, size and arrangement of parts may be made to the form of invention herein shown and described without departing from the spirit of the invention or the scope of the following claims.

I claim:

1. As an article of manufacture an elongated body of self-sustained but soft writing material having an end thereof provided with an impeller contacting shield of other protecting material, the forward surface of which extends at least flush with the outer surface of the writing ma terial and has a chisel edge.

2. In a mechanical pencil the combination of an elongated casing, feeding means carried by the casing, an elongated sheath within the casing, and a writing element longitudinally slidable in said sheath in frictional contact with the inner walls thereof having a protecting shield on the inner end thereof facing the feeding mechanism and adapted to be contacted thereby to feed the writing element through the sheath, said shield having a forward edge in close scraping contact with the inner walls of said sheath for the purpose of cleaning said walls as the writing element is fed by the feeding mechanism ported by the casing including a screw threaded member threaded in said opening, a longitudinally split sheath, means normally contracting said split sheath to entirely close the split thereof,

' said sheath being mounted in said casing for nally split sheath, means normally contracting slight longitudinal movement therein, means at the fore end of the casing to normally contract the sheath when moved to its most outward position at the fore end of the casing, and a writing element frictionally supported within said sheath in position to be engaged by said feeding means for feeding it through the sheath.

4. In a mechanical writing element the combination of an elongated casing having a threaded opening therein, feeding means rotatably supported by the casing including a screw threaded member threaded in said opening, a longitudinally split sheath, means normally contracting said split sheath to entirely close the split thereof, said sheath being mounted in said casing for slight longitudinal movement therein, means at the fore end of the casing to normally contract the sheath when moved to its most outward position at the fore end of the casing, and a writing element frictionally supported within said sheath,

said writing element at its inner end having a protecting wall of non-crumbling material adapted to be engaged by said screw of the feeding means to feed the writing element through;

said sheath.

5. In a mechanical writing element the com-- bination of an elongated casing having a threaded opening therein, feeding means rotatably sup-- ported by the casing including a screw threaded member threaded in said opening, a longitudisaid split sheath to entirely close the split thereof, said sheath being mounted in said casing for slight longitudinal movement therein, means at sition at the fore end of the casing, a writing element frictionally supported within said sheath, in position to be fed through said sheath by the feeding means, and means to prevent rotation of the sheath within said casing.

6. As an article of manufacture an elongated body of self-sustained but soft writing material, and an impeller contacting shield of rigid protecting material mounted on an end of the writing material having an end wall covering the extreme end of the writing material and side walls tapering convergently towards said wall, the edges of the side walls remote from the end wall terminating in a sharp edge which lies substantially flush with the outer peripheral surface of the writing material.

7. In a mechanical pencil the combination of an elongated casing, means carried in the casing including an impeller for feeding longitudinally thru the casing, an expansible sheath mounted in the fore end of the casing means in engagement with said sheath acting to normally contract said sheath, an elongated cylindrical writing element of self-sustained but soft material frictionally slidably mounted within said sheath, and a cup-shaped protecting ferrule of rigid material mounted over the inner end of said writing material in position to be engaged by said impeller and fed thru said sheath for writing extension from said casing.

an elongated casing, means carried in the casing including an impeller for feeding longitudinally thru the casing, an expansible sheath mounted in the fore end of the casing, means in engage- 5 ment with said sheath acting to normally contract said sheath, an elongated cylindrical writing element of self-sustained but soft material frictionally slidably mounted within said sheath, and a cup-shaped protecting ferrule of rigid material mounted over the inner end of said writing material in position to be engaged by said impeller and fed thru said sheath for writing extension from said casing, said ferrule having a forward edge in scraping engagement with the inner l5 ;peripheral surfaces of said sheath for scraping the sheath clean as the writing material is fed by the impeller thru said sheath.

WILBUR D. MEASE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 8. In a mechanical pencil the combination of 30 

